Legg-Calve-Perthes disease (LCPD) is a rare hip disease. It affects children 2-12 years old. LCPD is a disorder of the top of the leg bone. The disorder interrupts blood flow to the hip. The loss of flow causes death of bone and impairs bone growth. Over time, it causes deformity as the bone breaks and reforms causing the child to limp. LCPD most often occurs in just one hip, with only about 10% of cases involving both sides.

Hip Joint
hip socket
Damage and repairs to the femoral head causes a limp.
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The cause of LCPD is unknown. Infection, trauma, and inflammatory processes are possible causes.